Rock-drill



W. A. SMITH.

y RocK DRILL. APPLICATION FILED JUNE 30., I.9I7.

1,340,505. Pawned May1s,192o.

2 SHEETS-SHEET 2.

Slleilli lflFFltlil,

WILLIAM A. SMITH, OF DENVER, COLORADO, ASSIGNOR TO THE DENVER ROCK DRILLMANUFACTURING COMPANY, GF DENVER, COLORADO, A CORPORATION 0F DELA- WARE.

ROCK-DRILL.

Specification of Letters Patent.

` Patented .May 18, 1920.

Appueation mea rune so, 1917. serai 110. 177,913.

To allzu/1,0m 'it may concern Be it known that l, vVrLLmM A. SMITH, acitizen of the United States, residing at Denver, in the county ofDenver and State of Colorado, have invented certain new and usefulimprovements in Bock Drills, of which the following is a specification.

The present invention relates to rock drilling apparatus, and theprimaryobj ect is to provide novel, simple, and effective means foreffecting the rotation of the drill bit, while being operated on by thedrilling motor.

One embodiment of this invention is illustrated in the accompanyingdrawings, wherein Figure 1 is view in elevation of the apparatus,

Fig. 2 is a longitudinal sectional view-on an enlarged scale through themain portion of the same,

Fig. 3 is a cross sectional view on the line 3 3 of Fig. 2,

Fig. 4 is a detail. sectional `view substantially on the line 1t-4 ofFig. 3,

Fig. 5 is a detail sectional view taken substantially on the line 5-5 ofFig. 2.

Similar` reference numerals designate corresponding parts in the figuresof the drawings.

In the embodiment illustrated, a drilling motor, designated generally bythe reference numeral 6, is employed, projecting forwardly from a headblock 7, which head block carries rearwardly extending eXtensiblefeeding means 8. Considering first the head block 3, it will be seenthat it comprises a body portion formed of sections 9 and 10 having aninterfitting joint 11. The eXtensible feeding `means consists of theusual cylinder member 12 having a piston 13 therein, the cylinder memberin this instance being coupled to the head block by being abuttedlthereagainst and surrounded by a collar 111 through. which pass tiebolts 15 that are engaged with the front section 10 of thc head block,as shown at 16, in Fig. 1. These tie bolts thus serve to clamp thecylinder member to the rear section 9 of the head block, and also clampthe two sections `9 `and 10 together.` Formed in the head block andextending through the section 10 and into the section 9, is a forwardlyextending socket 17. It will be noted that the rear end of the cylindermember 6 has a rearwardly extenddesired type, though preferably of thevalveless character. 1t consists of a cylinder member 18 having a pistonchamber 19, in

which operates the head 20 of a hammer piston. rihis hammer piston isprovided with a rearwardly extending neck 21 having a reduced portion 22disposed adjacent to the head 20. rEhe neck portion operates in areduced chamber 23 communicating with the chamber 19 and extendingrearwardly therefrom. lVhen the motor is in operation, motive Huid,preferably air, is constantly supplied into the rear portion of thechamber 23 as is hereinafter explained, and the supply of this motivefluid passes through channels 241 and 25 alternately to opposite sidesof the head 20, this supply being controlled by the neck 21 with itsreduced portion 22 in a manner well understood to those skilled in theart. The exhaust from the motor takes place through the passageway 26.

The hammer piston 20 in this instance instead of operating directly uponthe drill head block, and on this gudgeon portion and l really forming apart thereof, is detachably fitted a sleeve 32 having an integral wormwheel 31 that is rotatable in a chamber p0rtion 35 formed in the headblock. It will be seen that this wheel is in the nature of a flange thatis located between the two sections 9 and 10 of the head block, so thatits movement in either direction longitudinally of the .machine isprevented, and a washer 36 ispreferably located against the rear side ofthis worm wheel, the joint being furthermore provided with a packinggasket 37. The detachable sleeve has its rear portion keyed, as shown at38, to the extension 31 of the cylinder member, and is held to saidextension by washers 39 abutted thereagainst and held in place by ascrew plug 40 threaded into the rear end of said extension 37. The partsare thus all effectively held together.

Motive fluid supplied from any suitable source is conducted by suitablemeans to a nipple 4l formed upon the head bloei; and communicating witha valve casing, in which is located the usual rotatable throttle valve42. The bore 43 of this valve is in constant communication with themotive fluid supply, and is provided with lateral ports 44, 45 and 46.The port 44 is movable into and out of communication with a passageway47 that communicates through a series of ports 48 with the neel; chamber28, and the ports 45 and 46 are movable into and out of coinmunicationwith a passageway 49 that conducts motive fluid to the extensiblefeeding means 8. lt will be evident that when vall the ports 44, 45 and46 are out of comnninication with the passageways 47 and inotive fluidis out off from the machine. lf the port 45 is brought intocommunication vith the passageway 49, motive fluid flows to the feedingmeans in suihcient quantity to cause the extension thereof, and thusraise the drill actuating motor to its work. lf the valve is turneduntil the ports 44 and 46 are brought respectively into communicationwith the passageways 47 and 49,1notive fluid is supplied beth to thefeedinel means and to the drill actuating motor, so that the latter isoperated, and as the drill hole is deepened, the motor is kept up to thework.

F or the purpose of rotating the drilling motor with respect .to thefeeding inea-ns and head block and thus rotsnhg the drill bit, thefollowing mechanism is preferably er-- ployed. A rotary motor is locatedvupon one 'de of the head block, and consists of a casing 50 having adetachable head 51 and containing a pair of intermeshing geared pistons52 yand 53. The piston 52 is an idler, being provided with a rollerbearing 53ct `operating .on a shaft 54 that extends across `the casingand has a bore 55 therethrough. The yother piston 53 is keyed to a shaft56 that projects into 5the :head block, and has a worm 57 in mesh withthe worm wheel 34, which as already described, is keyed to the .drillingmotor. The shaft 56 is provided with suitable `bearings 5S and 59. Thehead 51 of `therotary motor .casing 50 has an .eX- tension constitutinga handle grip 60 provided with achamber 61 in communication with thebore 55 `of the shaft 54, and leading tosaid bore 55 is a passageway 62.that is in communication with the motive fluid supply, as indicated indotted lines in Fig. l. Leading rfrom the chamber 61is a passageway/.63that opens into the rotary motor at oneside of the intermeshing.portions of the 1,.; idees pistons. An exhaust passageway 64 leads fromthe opposite side to the outer atmosphere. The chamber 61 at its pointof communication with the bore 55 of the shaft 54, has a valve seat 65,and movable into and out of cooperation with the valve seat, is a 1 nplug valve 66 carried by a screw handle 6r that is threaded on a stem68. This stem is screwed into the outer end of the chamber andconstitutes a closure therefor. lt will be eifident that by .rotatingthe handle 67 upon the stem 68, the valve may be seated or unseated, asdesired.

The operation may be briefly outlined as follows: 1When motive fluid isintroduced nto the drill actuating motor and to the feeding means asabove explained, the said motor will be held to its work, and will be inoperation. T he rotation of the drill bit is effected by the bodilyrotation of the drilling motor, and the rotation of said drilling motor,it will be observed, is independent of the rotation of the feedingmeans. That is to say, the feeding means and head block are held againstrotation by the handle, coinprising the parts 60 and 67. To effect therotation of the drilling motor, it is only necessary for the operatorgrasping the handle 60-67, to turn the part 67 in the proper directionand unseat the valve 6.6, whereupon the motive fluid will pass throughthe passageway 62, bore 55, chamber 6l and passageway 63 into the rotarymotor, effecting the rotation of the pistons thereof. The rotation ofthis piston will, of course turn the shaft 56, the worm 57 and the wormwheel 34. lnasmuch asthis worm wheel is keyed, as shown at 88 to thedrilling motor, the latter will be rotated, and consequently the drillbit will be turned with it.

Means are also provided for supplying a cleansing fluid to the drillbit. lt will be noted by Reference to 2 that said drill bit 30 has asusual a bore 70 longitudinally therethrough for the purpose ofconducting cleansing fluid to the bottom of the ydri-ll hole to .ejectthe cuttings. The rear section 9 of the head Ibloclr is provided with asocket 71 inwhich is fitted the rear `end of a tube 72 vthat passesthrough the plug 40, through the piston 20--21, through the tappet 27,and into the bore 70. This rear end is held in place by a plug 73. A.nipple 74, located atone side `of the head block, provides means forcoupling a water supply hose and from this nipple a passageway leads toand is in communication with the rear end of the tube 72. Tater or othercleansing fluid can thus be passed through the motor Yto .the drill bit.lt will be noted that this tube 72 `is held. against rotation, and thatthe drilling Inotor is rotatable about the same as an axis.

From .the foregoing, ,it is .thought thaJ the construction, operationand many adif'antages of the herein described invention will be apparentto those skilled in the art, without further description, and it will beunderstood that various changes in the size, sh ape, proportion, andminor details of construction, may be resorted to without departing fromthe spirit or scope of the invention.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. In apparatus of the character set forth, the combination with a headblock having a socket, a valve casing in the head block at one side ofthe socket, and a gear casing at the opposite side of the socket, of adrilling motor having a portion journaled in the socket, extensiblefeeding means connected to the rear end of the head block, channels forconducting motive fluid from the valve casing to the feeding means andto the motor, a throttle valve journaled in the casing for controllingthe supply of motive fluid and having a handle at one side of the headblock, a rotary motor mounted on the casing at the opposite side of thehead block and including gear mechanism in the gear casing, and a handleprojecting from the rotary motor.

2. In apparatus of the character set forth, the combination with a headblock comprising separable sections and having a bearing socket, of amotor having a gudgeon portion rotatable in the socket, and a retainingmember detachably mounted on and surrounding the gudgeon portion andinterposed between the sections 'of the head block to prevent thedisengagement of `the gudgeon portion from the socket, and means fornormally securing the retaining member on the gudgeon.

3. In apparatus of the character set forth, the combination with a headblock having a bearing socket and divided transversely thereof intoseparable sections, of a motor having a gudgeon portion rotatablymounted in the socket, and a sleeve detachably mounted on the gudgeonportioniand operating between the head block sections to retain thegudgeon portion in the socket.

4l. In apparatus of the character set forth, the combination with a headblock having a bearing socket and divided transversely thereof intoseparable sections, of a motor `having a gudgeon portion rotatablymounted in the socket. a gear element detachably mounted on the gudgeonportion and operating between the head block sections to retain thegudgeon portion in the socket, means for holding the gear element on thesleeve and preventing their relative rotation, and means engaged withthe gear element for effecting the rotation of the motor.

In apparatus of the character set forth,

the combination with a head block having a bearing socket and dividedtransversely thereof into separable sections, of a motor having agudgeon portion rotatably mounted in the socket, a sleeve detachablykeyed to the gudgeon portion and having a gear element interposed'between the sections of the head block, means on the rear end of thegudgeonv4 portion for securing the sleeve, and means mounted in the headblock and engaged with the gear element for effecting the rotation ofthe motor.

' 6. In apparatus of the character set forth, the combination with ahead block comprising sections, of a motor rotatably mounted in the headblock and having a portion interfitted in the sections to hold the motorand head block against separation, eXtensible feeding means for themotor, and common means for securing the feeding means to the head blockand the sections of the head block together.

7 In apparatus of the character set forth, the combination with a headblock comprising front and rearsections, of a motor rotatably mounted inthe head block, eXtensible feeding means for the motor, and side boltsconnecting the feeding means and front section to clamp the sectionstogether and secure the feeding means to the head block.

8. In apparatus of the character set forth, the combination with a headblock comprising front and rear sections and having a socket, of a motorhaving a gudgeon portion journaled in the socket, a retaining elementdetachably mounted in the gudgeon portion and located between thesections, extensible feeding means for the motor, and side boltsconnecting the feeding means and front section of the head block.

9. In apparatus of the character set forth, the combination with a headblock having a socket and a valve casing in the head block at one sideof the socket, of a drilling motor having a portion journaled in thesocket, a motor for rotating the drilling motor, fiuid supplypassageways from the valve casing to the drilling motor and rotatingmotor, a throttle valve inthe casing controlling the iuid supply to thedrilling motor, a handle for holding the head block, and a valveoperated by the handle for controlling the iiu'id supply to therotating` motor.

10. In apparatus of the character set forth, the combination with a headblock having a socket, a valve casing in the head block at one side ofthe socket, and a supply nipple communicating with the casing, of adrilling motor having a portion journaled in the socket, a motor mountedon the head block for rotating the drilling motor, a uid supplypassageway from the valve casing to the drilling motor, athrottle valvein the casing controlling said fluid supply passageway, a handle forholding the head block,

a Huid supply passageway from the nipple through the handle to therotating motor, and a valve operated by the handle for controlling thelatter passageway.

1l. The combination with a head block having a socket,- of a drillingmotor having a gudgeon portion in the socket and ineluding a removablesleeve having a gear there on andconstituting means for retaining thegudgeon portion in the socket, and a drill rotating motor mounted on thehead block and having gear connections with said gear.

12. The combination with a head block having rearwardly projectingmotive fluid operated feeding means and aforwardly eX- tending socket,of a drilling motor having a drill receiving ehuelr and also having arearwardly extending gudgeon portion rotatably mountedin the socket, asleeve mounted on said gudgeon portion and also locatedin the socket,said sleeve. having a worm gear, a rotary motor located upon one side ofthe headblock and including a transverse shaft having a worm engagedwith the worm gear, and means on said head block Jfor controlling thesupply of motive fluid to the drilling motor, to the rotary motor and tthe feeding means.

13. The combination with a drilling motor comprising a cylinder memberand a piston operating therein, of means passing through the piston fordelivering cleansing fluid to a drill bit operated on by said piston,said drilling motor and means being relatively rotatable, and means foreffecting their relative rotation.

14. The combination with a drilling motor, of a head block connectedtherewith, a water tube fixed to the head block and eX- tending throughthe motor, means for rotatably connecting the motor with the head block,and means for rotating the motor with respect to the head block andtube.

15. The combination with a support, of a drill actuating motor rotatablymounted on the support, a rotary motor geared to the drill actuatingmotor for rotating they same and including a rotary piston, a journalbearing for the piston comprising a hollow shaft, means for supplyingmotive iuid to said shaft, ,means4 for delivering the motive luidpassingthrough said'shaft to the rotary motor, including a hollow handle stem,and a valve .mounted on said stem and con trolling the i'luid supply.

l'n testimony whereof, I aliix my signature in the presence of twowitnesses.

WILLIAM A. SMITH.

Witnesses:

L. W'. RODOLF, RUTH. B. ZoLLARs.

